It may be a lake, a marsh, a spring or a glacier. This is where the stream starts. The source is the farthest point of the river stream from its estuary or its confluence with another river or stream. ... The farthest stream is called the headstream or headwater.
Answer:
Reticular activating system (RAS)
Explanation:
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Answer:
I think its chemical energy is not required because passive transport doesn't need energy at all
The UV rays cause sun spots due to reaction from the radiation.